Java中的条件验证

Question

I am trying to do bean validation in a Object graph. Lets say I have two classes called Foo and Bar. They have @OneToOne relationship.

Foo.class

class Foo
{
    String a;
    String b;
    boolean c;

    @Valid
    Bar bar;
}

Bar.class

class Bar
{
    String i;
    String j;
    String k;
    String l;
}

I want to validate Both Foo and Bar but I want to do conditional validation on Bar depending on the value entered in Foo.class. Depending on the value of c in Foo.class, I want to validate the fields in Bar.class. If c is true, then I want to validate i and j. If c is false then I want to validate k and l.

Is there anyway I can do it?

Answer 1

I don't think there's anything out there that does what you want out of the box. This said, there is JSR 303 which allows you to annotate your classes with custom validators. I suppose you could write a validator that can use some custom annotation you'd make and put on the boolean that dictates whether or not to run the Bar validator.

Answer 2

With plain Bean Validation it is not possible to do what you are asking. Hibernate Validator has a provider specific feature which is called @GroupSequenceProvider . With this feature you can change the group sequence which gets executed when validating an object. See also http://docs.jboss.org/hibernate/stable/validator/reference/en-US/html_single/#d0e3062